Tripping mechanism for printing-presses.



A.: ELLERY.

www@ MEGEAMSM im 911mm@ PRESSES,

APPLIATION FLED IAN. 27r i913,

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receive the second color or impression. In

presses of this type the imprinting cylinders are adapted to be raisedand lowered with relation to the bed-plate of the press. In

4 the press illustratedthe imprinting cylinders are normally held in araised position by the expansion springs 10, thisbeing the usualconstruction. ter are usually'provided with a series of links and camsor`other positively operating mechanism for lowering the "cylinders Inthe` machine upon whichI have chosen to illustrate mywtripping.mechanism each cylinder is'provided' with an eccentric 11, to which isrigidly attached a pair Aof rock arms12, (only one'of whichis shown uponeach cylinder in the drawings), one of said rock arms being provided ateither end of the cylinder. Downwardly depending from the free end ofeach rock arm .12 is a pivotally connected link 13, the lower extremityof each link being pivotally connected to a rock arm 14, each of said-rock arms being rigidly connected to a rock shaft 15. Each of the rockshafts 15 is rocked by means of a` suitable cam, not shown, upon therear side of the press. It is not thought necesf sary to go into detailas to the construction vof this cam as this is a construction com'- monto all presses of this type and needs nol l further description, it onlybeing necessary that some such mechanism is employed to rock the shafts15 properly.

The rock shafts 16 and 16a are provided upon their rear ends with theordinary tripping mechanism such as is common in presses of thischaracter', which mechanism is adapted to trip the cylinders 3 and etrespectively. The rock shaft 16 is provided upon its forward extremitywith the rigidly connected lever 17 provided with ,the pivotallyconnected foot pedal 18 and held in .raised position by means of theexpansion .spring 19. It will be readily seen that by depressing thep'edal 18 the rock shaft' 6- will be rocked through the medium of tielever 17 and the tripping mechanismlf the ordinary constructionheretofore mentioned will be operated, thereby tripping the firstcylinder 3. Pivoted upon the shaft 1611's the bell crank having the longand substantially `horizontal arm 20, and the comparatively shortvertical arm 21. Thearm 20 is provided with a foot pedal 22, and is heldin raised position by a spring 23 similar to the spring 19 on the lever17. The short arm 21 of the bell crank is provided with Presses of thischarac- Cam the horizontally disposed, liexible rod 24, the free end ofwhich contacts with the anguiar lever 25, which is ivotally connected asat 26 to a suitable bracket 27 secured upon the frame 1.

The lever 25 ordinarily rests upon the sto 27, provided upon the forwardface of the bracket V27, which holds the lever normally out of contactwith the rod 24. The upright arm 28 of the lever 25 is adapted to bebrought in to contact with the rear* end, of the stud 29, which isslidably mounted within anv aperture 30 located in the free end of thebent rock arm 31 and rovded upon its forwardend with an antrfrictionroller '32. The rock arm 31 is rigidly secured to the rock.V shaft 16*which as has been heretofore mentioned is provided upon its rear endwith the ordinary tripping mechanism such as is common in presses ofthis type, and/is fr the purposes of tripping the second imprintingcylinder 4. The

' 33 is fixedly mounted upon the shaft 34 which is suitably rotated by aseries 0f gearing, ynot shown, which is located upon the rear side ofthe press. It is not thought necessary to show up the gearing forrotating fthis cam or for that matter any of the gearing which rotatesthe cylinders and operates the] other parts of the press as this Aninclined projection 37 is So much-of the press is of the ordinaryconstruction such as is in common use at the present timeandtheoperation thereof is as follows :..When 1tis desired to trip thefirst cylinder 3 pressure is manually exerted upon the pedal 18, whichwill Arock the shaft 16 through the medium of the rock arm 17, and

thereby cause the tripping mechanism .for

the cylinder 3 to beoperated. Now if itis desired with this machine totrip the second cylinder the operator must judge the time exactly andafter tripping the first cylinder must manually. depress the pedal 22,rocking the bell crank upon the shaft 16 and bringing the flexible rod24 into contact with the angular' lever 25. the time and position of thecylinders as accurately as possible and then depress both of the pedalsat once, but this requires very accurate judgment as to the exactinstant when the pedals must be depressed and is very oftenunsuccessful. This action will The operator may gage l am @mi gli l ze 91w free 91d flink. is to 11@ "ma wd thrust n 13 of the by nmz 1.5.1

. ih@ mu nmmmly Dipping l.. "ust valium Carri -tripping the secondcylinder, said means including a flexible rod, flexible means connectingsaid rock arm to said flexible rod and a thrust' collar carried bysaid`- vertically reciprocatingv link and adapted to engage saidflexible means When said rock arm is manually operated automaticallytripping said second cylinder at a predetermined definite time after thetripping of said first cylinder.

5. In a multi-cylinder press of the character described provided withmeans for tripping the first cylinder, said means including a manuallyoperated rock arm and a vertically reciprocating link and means fortripping the second cylinder, said means includinga flexible rod; a linkconnected to said iexible rod, a foot formed upon said link, adetachable link connected to said foot, a bell. crank pivotallyconnected to said detachable link, a third `link connecting said bellcrank to said manually operated rock arm, and a thrust collar carried bysaid vertically reciprocating link and adapted to engage said foot whensaid rock arm is manually depressed, causing said second cylinder tc betripped at a predetermined defi nite time after the tripping of thefirst cylinder.

.6. in a multiple-cylinder press of the character described, providedwith means for tripping the first cylinder, said means including amanually operated rock arm and a vertically reciprocating link and meansfor tripping the second cylinder, said means including a rod, meansconnecting said rock arm to said rod and a thrust collar carried by saidvertically reciprocating link, and adapted to engage said means whensaid rock arm is manually operated automatically tripping said secondcylinder at a predetermined time after the tripping of said firstcylinder.

7. .In a multi-cylinder press of the char-A acter-described providedwith means for tripping the first cylinder, said means includingamanually operating rock arm and vertically reciprocating link and meansfor tripping the second cylinder, said means including a rod` a linkconnected to said rod,

a. foot formed upon said link, a detachable link connected to said foot,a bell crank pivotally connected to said detachable link, a third link`connecting said bell crank to said manually operated rock arm, und athrust collar carried by said vertically reciprocating link and adaptedto engage said foot when said rock arm is manually depressed, causing.said second cylinder to be tripped at a predetermined definite timesubsequentito the tripping of the first cylinder.

8. In a multi-cylinder press of the char- Y ARTHUR B` ELLERY.

lVitnesses CLnrUs C. Niconmrns, JOHN Mn'rzGER.

